Iron-nickel superalloy of the type in 706

Details Iron-nickel superalloy of the type in 706 Iron-nickel superalloy of the type in 706

C - Chemistry, Metallurgy

22

C

C22C 30/00 (2006.01) C22C 19/05 (2006.01) C22C 38/54 (2006.01) C22F 1/10 (2006.01)

Patent

CA 2184960

The iron-nickel superalloy of the type IN 706 has an addition of 0.02 to 0.3 percent by weight of boron and/or 0.05 to 1.5 percent by weight of hafnium. By means of this addition, a virtual doubling of the ductility is achieved as compared with an addition-free iron-nickel superalloy of the type IN 706, while the hot strength is reduced only slightly. This alloy is particularly suitable as a material for rotors of large gas turbines. It has a sufficiently high hot strength. When locally acting temperature gradients arise unwanted stresses can occur to only a slight extent because of the high ductility of the alloy.

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